23 If only the enamel layer
needs to be restored, then a single enamel shade of composite is selected and used.
It is coated with an ion-sensitive enamel layer
, providing an extremely smooth surface that prevents media from sticking during measurement, making the sensor very easy to clean.
Ironically, the fashion for whiter teeth has actually done more harm than good, as it has led to an increased numbers of abrasive whitening products which often harm the enamel layer
Abrasions make it easier for bacteria and acids to damage the tooth because the hard, protective enamel layer
has been brushed away.
Once the enamel layer
is worn out, the more fragile dentine layer gets exposed.
The fashion for whiter teeth has led to increased numbers of abrasive whitening products which could harm the enamel layer
Lack of interproximal contact because of lack of normal depth of the enamel layer
is frequently observed in the smooth and rough types of hypoplastic amelogenesis imperfecta.
Within each of the genera, variations between the types of enamel arrangements present in incisors verses those in premolars and molars are probably related to function, as are variations in enamel layer
thickness between genera.
The enamel layer
is preserved better and the thickness of the ceramic veneer is standardised.
Criteria for caries assessment of histological tooth sections Score Criteria 0 No demineralisation 1 Enamel demineralisation limited to the outer half (50%) of the enamel layer
2 Enamel demineralisation extending into the inner half of the enamel layer
and dentino-enamel junction 3 Dentine demineralisation in its initial layer 4 Frank dentine demineralisation Table 2.